KX-TDA0103X, KX-TDA0103XJ, KX-TDA0104X, KX-TDA0104XJ, ETX1KM753MB, ETX1KM752MB - Panasonic PBX Service Manual (repair manual). Page 2

2

PAGE

PAGE

1 Safety Precautions -----------------------------------------------4

1.1. For Service Technicians  ---------------------------------4
1.2. Insulation Resistance Test -------------------------------4

2 Warning --------------------------------------------------------------5

2.1. Caution--------------------------------------------------------5
2.2. About Lead Free Solder (PbF: Pb free) --------------5

2.2.1. Suggested PbF Solder -------------------------------5

2.3. Discarding of P. C. Board --------------------------------5

3 Specifications ------------------------------------------------------6

3.1. General Description ---------------------------------------6
3.2. System Capacity -------------------------------------------6

3.2.1. Power Supply Unit Selection -----------------------6

4 Technical Descriptions------------------------------------------7

4.1. Power Supply Unit Circuit Operation------------------7
4.2. PSU (KX-TDA0103X/KX-TDA0103XJ) ---------------7

4.2.1. Block Diagram------------------------------------------7

4.3. Circuit Description------------------------------------------8

4.3.1. AC Section ----------------------------------------------8
4.3.2. Rectifier and PFC Circuit ----------------------------9
4.3.3. Main Convertor--------------------------------------- 10
4.3.4. 15V Output Circuit----------------------------------- 11
4.3.5. 15VP Output Circuit--------------------------------- 11
4.3.6. 30V Output Circuit----------------------------------- 12
4.3.7. 41V Output Circuit----------------------------------- 12
4.3.8. Alarm Signal Output -------------------------------- 13
4.3.9. Protection Circuit ------------------------------------ 14

4.3.10. Battery Backup Circuit ----------------------------- 15

4.4. PSU (KX-TDA0104X/KX-TDA0104XJ) ------------- 16

4.4.1. Block Diagram---------------------------------------- 16

4.5. Circuit Description---------------------------------------- 16

4.5.1. AC Section -------------------------------------------- 16
4.5.2. Rectifier and PFC Circuit -------------------------- 17
4.5.3. Main Convertor--------------------------------------- 18
4.5.4. 15V Output Circuit----------------------------------- 18
4.5.5. 15VP Output Circuit--------------------------------- 19
4.5.6. 30V Output Circuit----------------------------------- 19
4.5.7. 41V Output Circuit----------------------------------- 20
4.5.8. Alarm Signal Output -------------------------------- 20
4.5.9. Protection Circuit ------------------------------------ 21

4.5.10. Battery Backup Circuit ----------------------------- 22

5 Location of Controls and Components------------------ 23

5.1. Installing/Replacing the Power Supply Unit ------- 23

5.1.1. Function------------------------------------------------ 23

5.2. Installing the Power Supply Unit---------------------- 24
5.3. Replacing the Power Supply Unit -------------------- 25

6 Troubleshooting Guide---------------------------------------- 26

6.1. KX-TDA0103X/KX-TDA0103XJ Power Unit 

Troubleshooting ------------------------------------------ 26

6.1.1. All Outputs no voltage ( 15V, 15Vpt, 41V, 

30V all no voltage ) --------------------------------- 26

6.1.2. Table ---------------------------------------------------- 27
6.1.3. Only 15Vpt/30V no voltage ( 15V, 41V 

have output voltage ) ------------------------------- 28

6.1.4. Table ---------------------------------------------------- 28
6.1.5. Only 41V no voltage ( 15V, 15Vpt and 30V 

have output voltage ) ------------------------------- 29

6.1.6. Table ---------------------------------------------------- 29

6.1.7. Only 41V has voltage ( 15V, 15Vpt, 30V no 

output voltage ) -------------------------------------- 29

6.1.8. Table --------------------------------------------------- 29
6.1.9. Only 15V no voltage ( 15Vpt, 41V, 30V 

have output voltage )------------------------------- 30

6.1.10. Table --------------------------------------------------- 30

6.1.11. Only 15Vpt no voltage ( 15V, 41V, 30V 

have output voltage )------------------------------- 31

6.1.12. Table --------------------------------------------------- 31
6.1.13. Only 30V no voltage ( 15V, 15Vpt, 41V 

have output voltage )------------------------------- 32

6.1.14. Table --------------------------------------------------- 32
6.1.15. All Secondary output operation are normal 

but DC ALM high------------------------------------ 33

6.1.16. Table --------------------------------------------------- 33
6.1.17. Fan not stop but FAN ALM (Low) activated -- 34
6.1.18. Table --------------------------------------------------- 34
6.1.19. AC Supply are normal and All Output 

Voltage operates Normally but AC Alm 
High ---------------------------------------------------- 35

6.1.20. Table --------------------------------------------------- 35
6.1.21. Battery Charging, Backup function not 

working ------------------------------------------------ 36

6.1.22. Table --------------------------------------------------- 37

6.2. KX-TDA0104X/KX-TDA0104XJ Power Unit 

Troubleshooting ------------------------------------------ 38

6.2.1. All Outputs no voltage ( 15V, 15Vpt, 41V, 

30V all no voltage ) --------------------------------- 38

6.2.2. Table --------------------------------------------------- 39
6.2.3. Only 15Vpt/30V no voltage ( 15V, 41V 

have output voltage )------------------------------- 39

6.2.4. Table --------------------------------------------------- 39
6.2.5. Only 41V has voltage ( 15V, 15Vpt, 30V no 

output voltage ) -------------------------------------- 40

6.2.6. Table --------------------------------------------------- 40
6.2.7. Only 41V no voltage ( 15V, 15Vpt, 30V 

have output voltage )------------------------------- 41

6.2.8. Table --------------------------------------------------- 41
6.2.9. Only 15Vpt no voltage ( 15V, 41V, 30V 

have output voltage )------------------------------- 42

6.2.10. Table --------------------------------------------------- 42

6.2.11. Only 15V/15Vpt no voltage ( 41V, 30V 

have output voltage )------------------------------- 43

6.2.12. Table --------------------------------------------------- 43
6.2.13. Only 30V no voltage ( 15V, 15Vpt, 41V 

have output voltage )------------------------------- 44

6.2.14. Table --------------------------------------------------- 44
6.2.15. All Secondary output operation are normal 

but DC ALM high------------------------------------ 45

6.2.16. Table --------------------------------------------------- 45
6.2.17. AC Supply are normal and All Output 

Voltage operates Normally but AC Alm 
High ---------------------------------------------------- 46

6.2.18. Table --------------------------------------------------- 46
6.2.19. Battery Charging, Backup function not 

working ------------------------------------------------ 47

6.2.20. Table --------------------------------------------------- 48

7 Service Fixture & Tools--------------------------------------- 49